Adjustable hanger for power-transmitter.



4 A. H. DE VOE.

ADJUSTABLE HANGER FOR POWER TRANSMITTERS. APPLICATION rum) AUG-"21, 1914.

1,182,255. Patented May 9,1916.

I559] 5HEETSSHEET 1- WITNESSES.

A. H. DE VOE.

ADJUSTABLE HANGER FOR POWER TRANSMITTERS.

APPLICATRON FILED AUG.21, I914.

Patented May 9,1916.

2 SHEETS-SHEET 2- Wl TNESSES:

UNITED STATES PATENT ornron;

ALBERT H. DE VOE, 0F WESTEIELD, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- EACTURING COMPANY, A CORPORATION OF'NEWJERSEY.

ADJ'I TSTABLE HANGER FOR POVVIiiR-TRANS1VII'J.".1]5JRS.

Specification of Letters Patent.

Application filed August 21, 1914. Serial No. 857,806.

To all whom it may concern:

Be it known that I, ALBERT. H. DEVOE, a citizen of the United States, residing at \Vestfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Adjustable Hangers for Power-Transmitters, of which the following is a specification, reference be ing had therein to the accompanying drawln s.

This invention relates to adjustable hangers for power-transmitters and it'has for its object to provide devices adapted to facilitate the adjustment of the driving and transmission belts leading to and from the powertransmitter, the device being especially adapted for use in connection with powertransmitters for sewing machines, and improving the method illustrated in United States patent to Miller & Marx N o. 7 03,942,

of July 1, 1902. In, the aforesaid patent the power transmission device comprises the motor-pulley of an electric motor, which is bodily adjustable by means of screws to tighten or slacken the driving belt connecting the motor pulley with the driving pulley of a sewing machine.

Inthe present improvements the powertransmitter-Which comprises the usual driv ing and transmission pulley with connected starting lever and brake device-is capable of bodily movement for the same purpose as that for which the Miller etakconstruction was designed, but the means employed permit a quick adjustment of the transmission belts, and the belts maybe instantly relieved of tension when desired, The power-transmitter is mounted in a hanger slidingly connected to a supporting bracket secured to the under face of the power-table which receives the machine or machines to be driven by the transmission belt. c

A shifting lever fulcrumed upon the supporting bracket engages astudupon a member of the hanger and may be operated to bodily move the latter and thereby to tighten or loosen the belts, the hanger being held in its adjusted position by means of a pivotal spring-pressed segment-ratch which is engaged by a tooth of the shifting lever. The construction is such that the operator may tighten the belts by swinging the shifting lever in the required direction and the comprising two alined bosses operator may instantly retract the segmentratch and thereby automatically relieve the belts of tension.

1n the drawings, Figure l is a front elevation of the improvements as applied to a power-table, and Fig. 2 is an end elevation of the same. Fig. 3 is a bottom view of the supporting bracket, showing the hanger, slide-pins and shifting lever connected thereto, and Fig. 4: is a perspective view of the same parts.

The power-transmitter, which forms no part of the present invention, comprises the Patented May a, 1916. c

usual driving pulleys 1 1 and the transmission pulley 2 loosely mounted upon a suitable shaft supported by the main arm 3 of a hanger comprising the arms 3, 4 and 5, the latter two arms supporting the usual starting and brake-lever 6 which, in practice, is operated by a treadle through the rod 7. It will be understood that the driving pulleys are, connected to the source of power by a suitablebelt or belts, and that the groovedtransmission pulley 2 may be connected with thevmachine or machines by means of the usual leather belt of, small diameter. g

The supporting member for the hanger comprises abracket B secured by means of the screws 8 to the'under face of the powertable A and formed with the depending series of bearing bosses a b 0. each series offset from the other bosses of the series and adapted toreceive and support the slide-pins 9, 10 and 11, respectively. The slide-pin 9 is formed with two fiat seats 9 which correspond with a similarly formed seat 10 on slide-pin 10 and a seat 11 on slide-pin 11. The aforesaid seats on slide-pin 9 are provided with threaded apertures and are adapted to receive the lateral extensions or shoulders of the main,

hanger-arm 3, the said extensions (indicated by numeral 12 in Fig. 2) being secured to the pin by fastening screws. slide-pin 10 also is provided with a threaded aperture to receive a fastening screwby means of which hanger-arm 4 is secured to The seat 10" of the pin, and the long oflset hanger-arm 5 I is secured to slide-pin 11 in a similar manner, as will be understood without further explanation. c p

It will be seen that the arrangement above described permits the hanger and the transmitter members supported thereby to be bodily moved relatively to the power-table A,

' formed in the pin. By swinging the shifting lever.

ing lever to the left or right, as occasion arises, the slide-pins and the connected hanger and transmitter will be bodily moved in the desired direction.

Any suitable detent-member may be employedto hold the transmitter in its adjusted position. In the present instance a pivotal spring-pressed segment-ratch 17 is supported by the bracketv B in position to be engaged by a tooth t projecting from the face of shifting lever 13. The depending extension 14.- of bracket B is provided with spaced apertured lugs 18 which receive a pivot-pin 19, the latterpassing' through the apertured ends of yoke, comprising theupwardly extendingarms 17 of the segment-ratch 17, whereby the ratch is supported to swing toward and from the shift- One faceof each tooth t of the ratch 17 is inclined, so that the shifting lever may be freely swung in a direction to tighten the transmitter-belts, but the lever, through its projecting tooth 6*, is held against movement in the reverse direction by the angular wall of the adjacent ratch-tooth. Before the lever may be operated to loosen the belt it is necessary to move the ratch against the action of a spring 20 which acts normally to maintain the ratch pressed against the face of the lever. Ihe spring 20 is fitted within a cup 21 on bracket B and presses upon a lug 22 which P'OjQClJS from the ratch at the rear of arm 1 a It will be understood that various changes may be made in the form and arrangement of the elements herein shown and described without departing from the spirit of the invention. For example, theform of the I hanger may be modified, and means other than the pins 9, 10, 11, may be employed to. aflord .a sliding connection between the hanger and. its supporting bracket.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Having thus set forth the nature of the invention, what I claimherein is 1.1 In power transmissiondevices, the combination with a supporting bracket, of a hanger, a pulley supported in said hanger, means connecting the bracket and said hanger and permitting bodily adjustment of the latter, a shifting lever operatively connected to said hanger, and adapted to be manually swung to instantaneously adjust the position of the hanger, and means whereby the hanger may be held in its ad justed position.

2. In power transmission devices, the combination with a supporting bracket, of a hanger, driving and transmission pulleys supported in said hanger, a sliding connection between said hanger and the bracket, means for bodily ad usting the hanger relatively to its supporting bracket to impose tension upon a belt, a detent device for holding the hanger in its adjusted position, and means whereby the detent device may be instantly retracted and the belt automatically relieved of tension.

3. In power transmission devices, the com bination with 'a supporting bracket, of a hanger, a pulley supported in said hanger, means connecting the bracket and said hanger and permitting bodily movement of the latter, a shifting lever fulcrumed upon 7 the bracket and operatively connected to said hanger, 'a detent member pivotally mounted upon the bracket, and means whereby said detent member may be yieldingly maintained in operative relation with said shifting lever.

4. In power transmission devices, the combination with a supporting bracket provided with alined bosses, of a pin fitted within said bosses, a hanger connected bysaid pin tothe bracket and capable ofbodily movement relatively to the latter, apulley supported in said hanger, a shifting device ,operatively connected to said hanger, a ratch pivoted upon the bracket for movement towardand from said shifting lever, and a spring normally acting upon said ratch to press the same into operative engagement withthe shifting lever.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

lVitnesses W. LEE HELMS, IVM. P. STEWART.

Washington, I). O. Y

ALBERT n. :on VOE. 

